Make down-conversion explicit from CFX_ByteString to CFX_ByteStringC.

core/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp

Index: core/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp
diff --git a/core/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp b/core/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp
index 5a3db292e0f006c31a2d7693c98045daf9d0fc64..d04a682b77cfa05bc56b3854e46ec38cc8be6965 100644
--- a/core/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp
+++ b/core/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp
@@ -399,7 +399,7 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjectHolder* pObjList,
       }
     }
     m_Pos = SavedPos;
-    return new CPDF_Number(word);
+    return new CPDF_Number(word.AsByteStringC());
   }
 
   if (word == "true" || word == "false")
@@ -521,7 +521,7 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict(
         return new CPDF_Reference(pObjList, FXSYS_atoui(word));
     }
     m_Pos = SavedPos;
-    return new CPDF_Number(word);
+    return new CPDF_Number(word.AsByteStringC());
   }
 
   if (word == "true" || word == "false")